JSPM

Detect if the browser supports passive events

Detect device type and render your component according to it

Node.js implementation of port detector

A simple, performant, and cross-browser hook for handling scroll in your next react app.

Check if a string matches the name of a Node.js builtin module

Detect whether the terminal supports Unicode

Check if the process is running inside a Docker container

Check if the process is running inside Windows Subsystem for Linux (Bash on Windows)

Check which JavaScript environment your code is running in at runtime: browser, Node.js, Bun, etc

Returns true if a file path is absolute. Does not rely on the path module and can be used as a polyfill for node.js native `path.isAbolute`.

Detect whether a terminal supports color

Check if stdout or stderr is interactive

Detect if the current environment is a CI server

Detect the indentation of code

Check if argv has a specific flag

Check if the character represented by a given Unicode code point is fullwidth

Low footprint ECMAScript source code parser

Detect whether a terminal supports hyperlinks

Check if something is a Node.js stream

Get details about the current Continuous Integration environment

Check if a file path is a binary file

Regular expression for getting the root of a posix or windows filepath.

Check if a project is using Yarn

Wrapper component that detects element resize and passes new dimensions down the tree. Based on [element-resize-detector](https://github.com/wnr/element-resize-detector)

Check if the process is running in a Continuous Integration (CI) environment

Detect the file type of a file, stream, or data

Detects clicks outside React components, and also handles keypresses.

Detect whether or not an object is a Typed Array

Check if something is a generator function

Convert and detect character encoding in JavaScript

Unpack a browser type and version from the useragent string

Detect Node.JS (as opposite to browser environment) (reliable)

Check if your package was installed globally

Find and fix unused dependencies, exports and files in your TypeScript and JavaScript projects

Check if the process is running inside a container (Docker/Podman)

Check if your code is running as an npm script

Detect Node.JS (as opposite to browser environment). ESM modification

Check whether operating system CPU architecture is 64-bit or 32-bit (Supports browsers)

Detect if your code is running on an AWS Lambda server

Detect which package manager you're using (yarn or npm)

A tool to get browser's scrollbars width.

Check if something is a promise

Check if a file path is a text file

Get the operating system CPU architecture

Check if a string is an IP address

Return true if a file path is (or has) a dotfile. Returns false if the path is a dot directory.

Run the Node.js binary no matter what

Detects if a file exists and returns the resolved filepath.

detect available port

Offline and Online components for React

Detect native Uint32Array support.

Detect native Symbol support.

Detect native Symbol.toStringTag support.

Isomorphic, functional type-checking for Javascript

Detect native Float32Array support.

Detect native Float64Array support.

Detect native Uint16Array support.

Check if a value is a Fetch network error

Detect native Buffer support.

Detect native Uint8Array support.

A simple binding to Google's cpu_features library for obtaining information about installed CPU(s)

Provides utilities to check if ad block is enabled on a page via both a React hook and a wrapper component.

Check if a Buffer/Uint8Array is a GZIP file

Check if a number is a redirect HTTP status code

Detect and extract the static part of a glob string

find undeclared identifiers and property accesses in a javascript file.

Classify GPU's based on their benchmark score in order to provide an adaptive experience.

Check if Electron is running in development

Detect the indentation of code (commonjs fork)

Determine if a filename and/or buffer is text or binary. Smarter detection than the other solutions.

Check if a string is SVG

Detect the archive type of a Buffer/Uint8Array

Check if a value is an Observable

Detect the archive type of a Buffer/Uint8Array

Check if the current Linux session is using Wayland

Device detection (phone, tablet, desktop, mobile grade, os, versions)

Check if a value is a function

Regular expression matching for URL's. Maintained, safe, and browser-friendly version of url-regex. Resolves CVE-2020-7661. Works in Node v10.12.0+ and browsers.

Checks if the given value is a window object.

Analyze circular dependencies in your JavaScript/TypeScript projects.

Check if a string only contains alphanumeric characters

Check if a Buffer/Uint8Array is a PNG image

Check if a string is a scoped npm package name

Detect if a device is mouse only, touch only, or hybrid

Check if the internet connection is up

Check if the process is running inside a Podman container

Check if a Buffer/Uint8Array is a JPEG image

Check if a Buffer/Uint8Array is a GIF image

Charset Detector - Detect the encoding and language of text files - Use it in the browser, with Node.js, or via CLI

Check if a Buffer/Uint8Array is a TAR file

Check if a string is HTML

capability.js - javascript environment capability detection

A Svelte action that monitors an element enters or leaves the viewport or a parent element. Performant and efficient thanks to using Intersection Observer under the hood.

check if an AST node is a function of some sort

Check if a value is a `Blob`

Detect native generator function support.

Check if servers are reachable

check if an AST node is a MemberExpression, in general or a specific one

Check if browser is Firefox

Detect native Int32Array support.

Check if a Buffer/Uint8Array is available for cwebp image source

Detect if the current device support the specified emoji

Detect native Int16Array support.

Check if browser is Internet Explorer

Detect the language of text

Detect native Uint8ClampedArray support.

Resolve the preferred locale based on the value of an `Accept-Language` HTTP header.

Detect native Int8Array support.

Returns `true` if a value exists in the given string, array or object.

Collection of 70+ type, feature & value checks

detect in-app browsers

Detect and Normalize the newline characters

Detect the appearance of an element in the browser DOM

Checks if the given value is null or undefined

check if the current node version has async_hooks.

Analyze circular dependencies in your JavaScript/TypeScript projects with Rust.

Detect and validate file types by their signatures (✨magic numbers✨)

Platform detection: NodeJS? React? ReactNative? Expo? etc.

Detect the language of text

Detect native Symbol.iterator support.

Checks if the given value is a native function.

Check if a Buffer/Uint8Array is a ZIP file

Detect the image type of an ArrayBuffer/Uint8Array

Detect if current process is a node application or not.

Instantly detect support for WEBP images in the browser in 0.2KB

Get the language associated with a file extension or the extensions associated with a language using the data from GitHub's [Linguist YAML file](https://github.com/github/linguist/blob/master/lib/linguist/languages.yml)

Detect the audio type of a Buffer/Uint8Array

Check if a Buffer/Uint8Array is a BZIP2 file

Checks that given package is installed globally or locally.

Check if a string is an IP address

4-directional swipe detection for react-native.

Detect native function name support.

JavaScript module detecting bots/crawlers/spiders via user-agent

Count syllables in English words

Check if the process is running with elevated privileges

React component to detect browser

@wora NetInfo

Check if a string is a valid filename

Helpers for handling mobile devices

A proxy to `path`, replacing `\` with `/` for all results

JavaScript wrapper for pointer and any-pointer media queries

Get the name of a project, from package.json, git config, or basename of the current working directory.

Detect if the browser supports the touch events api

A React component that renders its children if an ad blocker is detected

JavaScript wrapper for hover and any-hover media queries

Determine whether an element is completely within the browser viewport

Executes a command when a change is detected in specified files. Not an active file watcher.

Detect if DevTools is open and its orientation

Language detection for Javascript. Based on the CLD2 (Compact Language Detector) library from Google. Highly optimized for space and speed. Runs about 10x faster than other libraries. Detects over 160 languages. Full test coverage. Runs on Linux, OS X, an

Arcjet runtime detection

Check if something is a Node.js stream. This is a fork of sindresorhus/is-stream, but with CommonJS support.

TypeScript / JavaScript library for detect WebAssembly features in node.js & browser

Check if a JavaScript environment has a DOM

Simplify detecting your browser

Get the version of the package.json file found in the given directory or in one of its parents.

Detect which ES6 (ES2015 and above) features are available

Detects active internet connection, and API server status in Angular application.

Scans a repository directory, searching for a changelog file

Check if the process is running as administrator on Windows

Get document, if there’s DOM.

a lightweight Events API for detecting scroll and touch events based on custom sensitivity

@wora Detect Network

Detect whether the code is running in TS Node

detect container resizing

ES6 and ES7 feature detection.

XML detection plugin for file-type

Simple and Performant Language detection library (pure JS and zero dependencies)

The React hook to detect if the device is mobile or desktop.

check if an AST node is a call to require()

JavaScript/TypeScript filter and checker for bad words aka profanity

Scrypted Video Analysis Plugin. Installed alongside a detection service like OpenCV or TensorFlow.

Check if a file path is an image

react network detection hooks

React adblock detector

Detect the MIME type of a Buffer, Uint8Array, ArrayBuffer, ReadableStream, file path and file name, with async method.

Detect browser language

Glin-Profanity is a lightweight and efficient npm package designed to detect and filter profane language in text inputs across multiple languages. Whether you’re building a chat application, a comment section, or any platform where user-generated content

check if an AST node is a call to require()

Checks the filesystem for potential license files and attempts to detect what they are

find and identify a cycle in a directed graph

Check if an Array is sorted

Check if a Buffer is a STUN message.

Check whether a file can be executed

Scrypted OpenVINO Object Detection

Regular expression matching for email addresses. Maintained, configurable, more accurate, and browser-friendly alternative to email-regex. Works in Node v14+ and browsers. Made for Spam Scanner and Forward Email.

Checks if the given value is an array or array-like object.

Detect if the network is up (do we have connectivity?)

Regex for matching dot-directories, like `.git/`

Check if a String/Buffer/ArrayBuffer is OTF

It's FuckAdBlock with a minimalist API.

Detect character encoding using ICU

Detect native DataView support.

Check if a String/Buffer is TTF

Detect native ArrayBuffer support.

Quickly detect the EOL used in a string.

Detect the language of text

Utility to check if internet is connected or not

Check if a file path is a video file

Detects where the current browser extension code is being run. Compatible with Firefox, Chrome and derivates.

Lint HTML and template source files for hardcoded (untranslated) strings

🃏 Minimalistic isomorphic library for detection of platform, runtime, APIs and more.

Detect native BigInt support.

anchor scroll detect for react

Discover the variable names chosen for each of a file's top-level required modules

Detects if a file is binary based on its content

Detect copy-pasted and structurally similar code. Supports ES2020 standard (and most proposed features), TS and TSX files. Using Babel 8's parser.

A pitch-detection library for node and the browser

a lightweight Events API for detecting scroll and touch events based on custom sensitivity

migration tool for sequelize & typescript users

check browser and browser's version from userAgent

Feature detection in the browser before loading polyfill using services like polyfill.io

Detect when an element is ready in the DOM

Check if a Buffer/Uint8Array is WOFF

Detect if a Node.js process is in the debug mode.

Converts between RSA key formats, detecting input format (PEM, DER, PKCS1, PKCS8). No OpenSSL needed.

Detect file type by signature

Check if a Buffer/Uint8Array is a FLAC file.

Check if a buffer/Uint8Array is a woff2 file

Regular expression for matching words in a string. Support for english, CJK and Cyrillic.

Check if a Buffer/Uint8Array is EOT

Superset of RESPONSIVE DIRECTIVES to show or hide items according to the size of the device screen and another features in Angular 9

Detect the character encoding using Google’s compact_enc_det library

Detect unused CSS in angular components

Library to check unused resolvers at Ovrsea

Fork of cld with pre-built binaries for OS X and Linux. Language detection for Javascript. Based on the CLD2 (Compact Language Detector) library from Google. Highly optimized for space and speed. Runs about 10x faster than other libraries. Detects over 16

Scrypted CoreML Object Detection

Check if a Buffer/Uint8Array is a wav file.

Detect structural similarities in your code

Scrypted Tensorflow Lite Object Detection

Check if a Buffer/Uint8Array is an OGG file.

Detect Node.JS (as opposite to browser environment) (reliable)

Detects browser and React Native source-code bundlers

Checks if the given value is a valid array-like index.

Check if a Buffer/Uint8Array is a m4a file.

Detects whether browser has an active internet connection or not in Angular application.

Check if a Buffer/Uint8Array is a MP3 file.

React Native component that notifies if the user is active state or inactive sate (i.e. when the app surface hasn't been touched for more than a certain amount of second than it will be move to Inactive State means Inactive Screen).

JavaScript module to check if user agent to return the device and browser.

Simple module for getting the current mouse position in element or window.

Check whether a string has any emoji

React hook for checking mouse acceleration

Fast and native browser detection on Windows

Read a glob of files, dynamically choosing the reader or requiring the files based on the file extension.

Get details about the current Continuous Integration environment

Lightweight React hook for checking health of API services.

Match the words in a string. Support for english, CJK and Cyrillic.

detect available port

React context provider and hook to check if the internet connection is up

Detect the license of node.js projects and their dependencies

A small and simple utility package that can validate any kind of image. It can detect corrupt files, or invalid image urls